Surface decontamination efficacy determination of DeconGel™ 1101 on aluminum, stainless steel, and concrete surfaces contaminated with Navy Dye Marker was performed with LC/MS (Liquid Chromatography/Mass Spectrometry) according to Environmental Protection Agency (EPA) SW-846 Methods: 3500C (sampling) and 8321B (analysis).
Hazardous Materials Relevance
Navy Dye Marker is a water-soluble dye used as an ocean marker for a variety of applications and uses. Navy Dye Marker resists short-term environment-mediated degradation and possesses a strong chromophore, and as such even small amounts of dye are plainly visible on both porous and non-porous surfaces, complicating the complete and facile removal of Navy Dye Marker from commonly utilized surfaces.
- As seen in Table 1, excellent surface decontamination was achieved by applying DeconGel 1101 onto contaminated surfaces, resulting in encapsulation of Navy Dye Marker contaminant by DeconGel's active components. Decontamination efficacies of poured DeconGel 1101 ranged from 99.1% (on concrete) to 99.3% (on aluminum) to 99.4% (on stainless steel) as determined by residual swipe/solvent extraction analysis. Additionally, for concrete substrate, no residual dye was detected visually when adding droplets of water to the concrete panels after DeconGel administration and film peel.
- Optimized experimental and analytical methods were successfully developed following standardized EPA sampling and analysis methods as guidelines for determination of organics in polar solvent solvated samples. When necessary, the digestion methods were customized to result in the complete dissolution of the organic contaminants and to ensure accurate decontamination efficacy determination of DeconGel.
Table 1 shows the decontamination efficacies of DeconGel 1101 on stainless steel, aluminum, and concrete surfaces contaminated with Navy Dye Marker as determined by residual swipe/solvent extraction testing.